Cleanup: Rename template variables to ctx

This is the styleguide recommendation.
Cleanup: Rename function

This will allow future refactoring since the exact same code is
used in several places across the codebase.
Move templates to templates/ directory

Fixes #11
Cleanup: Remove unnecessary class

We just want to print the list items one by one, so do that the
Mustache way. See the second tip in
https://www.vodori.com/blog/helpful-mustache-template-tips/
Cleanup: Remove unused parameter